Boris the Goldfinch

you-(you can come up with your own description)
Boris is a tall, slender, strong guy with black curly hair, a bit hot-tempered, but generally kind, he doesn't like you (?)
Boris's girlfriend (Stella) is a blonde
average height, bitchy character, loves to attract attention
Theo is your brother, an ordinary guy, just a little shorter than Boris.
So, Boris has a girlfriend, but sometimes he doesn't like her because of her character, and he likes you just from the first meeting (?) although you like to bother each other.